Wrench.



PATENTED JAN. 22, 1907.

E. LAGHTEZB.

WRENCH.

APPLICATION FILED SEPT. 1. 1905.

2 SHEETS-SHEET 1.

JIM/WHO f I HbRRls PETERS co., WAsl-lmpnwn, n. c.

No. 841,986. PA-TENTBD JAN. 22, 1907.

B. LAUHEZE.

WRENCH.

APPLIOATION FILED SEPT. 7, 1905.

2 SHEETS-SHEET 2.

[1W5 01; M v '0 BY MUM/F5655 YHE NORRIS PETERS co., wasumcron, B4 c.

UNITED STATES PATENT orrron WRENCH- Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed September '7, 1905. Serial No. 277.419.

To all whom, it may concern:

Be it known that I, EMILE Lkonnzn, a citizen of the Republic of France,and a resident of Dijon, in said Republic, have invented certain new anduseful Improvements in Wrenches, of which the following is aspecification.

This invention relates to wrenches, and more particularly to wrencheswhich embody a shank on which is adjustable a jaw which cooperates witha second jaw rotatable about said shank, but fixed against axialmovement therealong.

One object of the invention is to provide improved means for mountingthe fixed jaw just mentioned whereby the mounting does not interferewith the use of the wrench in laces which are accessible withdifficulty.

A further object of the invention is to provide a construction in whichthe turning strain exerted on the wrench in tightening and looseningnuts is not received directly by the means for securing the fixed jawagainst axial movement on the shank, whereby such securing means isrelieved from strain.

With these ends in view the invention con sists in the novel featuresand combinations of parts to be hereinafter described and claimed.

In the accompanying drawings, in which corresponding parts are denotedby the same reference characters throughout, Figure 1 is a frontelevation of a wrench constructed in accordance with the invention. Fig.2 is a side elevation of Fig. 1. Fig. 3 is a front elevation of anotherform of wrench constructed in accordance with the invention, and Fig.4is a side elevation of Fig. 3.

Referring to the drawings, and more particularly to Figs. 1 and 2, Adenotes the shank of the improved wrench, which is provided withscrew-threads up to within a short distance of its outer end (L Said endis smooth and of cylindrical form and provided with a peripheral groovea of U- shaped cross-section. Mounted on and rotatable about said smoothend of the shank is a jaw C, extending laterally to either side of theshank. Said jaw is freely rotatable about the end a but is preventedfrom moving axially therealong by means of a pin E, which passestransversely through said jaw and into the groove a The extreme outerend of the shanlLA is provided with. a cylindrical enlargement a whichforms a continuation of the smooth end portion a and fits within thecylindrical bore of the jaw C, which is counterbored for this purpose.

I) denotes the movable jaw of the wrench, which is similar in form tothe jaw C, but provided with a threaded bore engaging the threads of theshank A. In order to maintain the jaws C and D in alinement with eachother when the shank is turned, so as to open or close said jaws,guide-pins c are fixedly secured within the upper fixed jaw and extenddownwardly through openings in the lower jaw, the latter thus having aslidable engagement with said pins.

In using the wrench the jaws are adjusted to the nut by turning theshank in the proper direction, as will be understood. It is an importantfeature of the invention that the cylindrical enlargement a receives theturning strain when the wrench is used to loosen or tighten a nut, andthereby relieves the securing-pin E from such strain, to which it wouldotherwise be subjected. In case said pin received the turning straindirectly it would be extremely liable to breakage; but in theconstruction described this is avoided, and said pin merely acts torestrain the fixed jaw from moving along the shank in longitudinaldirection.

Figs. 3 and 4 show a slightly-modified manner of mounting the fixed jaw.The head a of the shank is left smooth at its lower portion and providedabove smooth cylindrical enlargement. form the pin-receiving groove 6 isintermediately of the enlargement and vides the latter into two flangesa a shown in Fig. 3. The pin. 15 engages the groove 6 in the mannerhereinbefore described. In this case the cylindrical enlargement a. crelieves the securing-pin from strain in the same manner as theenlargement a in the form first described.

Having thus described my invention, I claim as new and desire to secureby Letters Patent A wrench comprising a threaded shank having a smoothhead provided with a pcripheral groove, a movable jaw threaded on saidshank, a fixed jaw rotatable about said head, a pin passing through saidfixed jaw and entering said groove to prevent the dis:

In this disposed said portion with a Int;

placement of said jaw longitudinally of the In testimony whereof I havesigned this shank, and a smooth cylindrical enlargement speci'ication inthe presence of two suhscrihformed on said head Within said fixed jawand ing Witnesses.

serving to receive the turning strain between EMILE LACHEZE.

the aw and shank when the Wrench is turned Vitnesses: in use and toI'elleVe said 13111 from such J. N. MENTENT, strain. PETER HIRTZ.

